That Is Where The Spirit Becomes Certain (Japanese: そこに貫く意地は固く Hepburn: Soko ni Tsuranuku Iji ha Kataku) is a song featured in Wild Arms 4, as Kresnik Ahtreide's leitmotif. It plays during various cutscenes throughout the game, including the scene at Port Rosalia where Kresnik rescues Jude's party from Jeremy Non, and again during the Jude vs. Kresnik battle at Platapana Passage. The song also plays during battles where Kresnik has joined the player party (Garra de Leon and Illsveil Prison), where it replaces Gun Blaze. The song can be found on the Wild Arms 4 Original Score (Disc 3, Track 11)
The song is one of two that are associated with Kresnik's character. The other is Feeling the Bonds.